Machine tool



June 14, 1949. A. J. o-- EIAL MACHINE TOOL Original Filed Nov. 22, 1943 UN-N" RI m An-n E1.E'IANLEY 3% fix- L1; Maw.

Patented June 14, 1949 MACHINE TOOL Alfred J. Conn,

ley, Maywood,

Oak Park, and Richard B. Stanassignors to La Salle Designing Company, Chicago, 111., a partnership composed of Alfred J.

Conn and Martha Conn Original application November 22, 1943, Serial No.

511,298, new Patent No.

2,399,594, dated April Divided and this application January 24, 194.6, Serial No. 643,124

2 Claims. (01. 8231) a tailstock for a lathe particularly to an immechanism for operating the This invention relates to type machine tool and proved hydraulic tailstock.

This application constitutes a division of our co-pending application, Serial No. 511,298, filed November 22, 1943, and now Patent No. 2,399,594, granted April 30, 1946.

An object of this invention is to provide a hydraulic operating mechanism for the tailstock of a lathe type machine tool which will selectively move the tailstock along the lathe bed or clamp it to the bed in any selected position thereon.

The specific nature of the invention, as well as other objects and advantages thereof, will clearly appear from a description of a preferred embodiment as shown in the accompanying drawings in which:

Fig. 1 is a side elevational view, partly in section, of a tailstock for a lathe type machine tool embodying this invention.

Fig. 2 is a sectional view taken along the plane 22 of Fig. 1.

Fig. 3 is an isometric view of the operating collar.

be any longitudinally adjustable center I5 and a hand-wheel l6 for accomplishing longitudinal positioning of the center l5.

The tailstock 3 to and from a double acting is moved along the lathe bed I work supporting position by a ll suitably 1 is connected to the rear of tailstock 3 through a shaft-like member l8 threadably secured in the rear end of wedge 20. An integral rectangular projection 22 is provided on an operating collar 2| surrounding shaft l8. A plate 5 is secured to the rear of tailstock 3 and has a rectangular hole 6 therein through which shaft member I8 passes. Collar member 2| is rotatable by handle l9 between two positions which are angularly displaced by a substantial angle.

In one position the rectangular projection 22 on collar 2| is misaligned with respect to hole 6 and hence the force of hydraulic motor is applied to late 5 to move tailstock 3 along the lathe bed to its work engaging position. Upon reaching such position the handle I9 is rotated to its other position where projection 22 is in alignment with hole 6. Then upon applying the hydraulic force of motor I! the force will be transmitted to wedge 20, forcing it between tailstock 3 and the lathe bed and hence rigidly securing the tailstock to the bed I. Thus all vibration of the tailstock is substantially eliminated.

To retract the tailstock, operation of the foot valve (not shown) reverses the fluid applied to motor The shaft l8 being threaded into wedge 20 retracts the wedge and then the end of wedge 2|] engages the inner surface of plate 5 and thus the entire tailstock is retracted.

If desired, a stop rod 25 may be provided. Such rod has one end secured to tailstock 3 and the other end passes through a bushing l secured to lathe bed I. A stop 26 is adjustably secured to the extreme end of rod 25. Thus the movement of tailstock 3 in a work engaging direction may be limited according to location of stop 26 on rod 25.

We claim:

1. In a machine tool having a bed and a member slidably mounted on such bed, the improvement comprising a sliding wedge arranged to engage between said bed and said member, an operating rod secured to said wedge, hydraulic means operative to move said operating rod, a collar romember to the bed.

2. In a machine tool having a bed and a tailstock slidably mounted on such bed, the improvesecured to said wedge, a hydraulic cylinder mounted on the bed and connected to said rod whereby said wedge may be advanced or retracted with respect to said tailstock, a collar mounted on said rod adjacent the rear end of the tailstock, a handle connected to said collar and arranged to rotate said collar between two positions, and projections on said collar arranged to abut against the rear portion of the tailstock in one of such positions and to clear the tailstock in the other position whereby said hydraulic cylinder may be selectively utilized to advance the tailstock along the bed or to advance said wedge with respect to the tailstock to lock said tailstock to the bed.

ALFRED J. CONN.

RICHARD B.

REFERENCES CITED The following referemces are of record in the file of this patent:

UNITED STATES PATENTS Number 

